Yamilet Peña Abreu (Dominican Republic)

What she lacks in execution, Peña Abreu makes up for in difficulty. She is only the second woman to complete the Produnova—that’s a handspring double front vault—and the first to complete it in competition since its namesake Elena Produnova in 1999. With a difficulty score of 7.1, it’s far and away the most difficult vault. The Amanar, the second-highest vault being attempted at the Olympics, carries a difficulty score of 6.5. It’s highly risky. During the vault final at the 2011 World Championships, Peña Abreu landed on her back and received a score of 0.00.